Homicide is the killing of a human being by the act, procurement, or omission of another, death occurring at any time, and is either (1) murder, (2) homicide by abuse, (3) manslaughter, (4) excusable homicide, or (5) justifiable homicide.
RCW 9A.32.010
Excusable homicide: RCW 9A.16.030.
Justifiable homicide: RCW 9A.16.040 and 9A.16.050.